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Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
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Accuracy and Potential Benefit of Ultraselective Invasive Coronary Angiography Guided by Computed Tomographic

Konrad A J van Beek, Anouk G W de Lepper, Marcel Van't Veer

  • 1Catharina Hospital Eindhoven, Department of Cardiology, Michelangelolaan 2, 5623 EJ Eindhoven, The Netherlands. lokien.v.nunen@catharinaziekenhuis.nl.

The Journal of Invasive Cardiology
|April 22, 2022
PubMed

Insights

Computed tomographic coronary angiography (CTCA) accurately predicts normal coronary arteries, enabling ultraselective invasive coronary angiography (ICA). This approach significantly reduces procedure time and radiation exposure in patients with coronary artery disease (CAD).

Area of Science:

  • Cardiovascular Imaging
  • Interventional Cardiology
  • Radiology

Background:

  • Computed tomographic coronary angiography (CTCA) is a non-invasive imaging technique.
  • The utility of CTCA for guiding ultraselective invasive coronary angiography (ICA) by omitting visualization of normal contralateral arteries is not well-established.
  • Coronary artery disease (CAD) management requires accurate assessment of coronary anatomy.

Purpose of the Study:

  • To assess the accuracy of CTCA in predicting a normal contralateral coronary artery.
  • To evaluate the feasibility of an ultraselective ICA approach guided by CTCA findings.
  • To determine potential reductions in procedure time and radiation exposure with this ultraselective strategy.

Main Methods:

  • Retrospective analysis of 202 patients with CAD limited to either the left or right coronary artery on CTCA.
  • Primary endpoint: accuracy of CTCA in predicting a normal contralateral artery confirmed by ICA.
  • Secondary endpoints: procedural time and radiation dose (dose area product) comparison between standard and ultraselective ICA.

Main Results:

  • CTCA correctly predicted a normal contralateral coronary artery in 99.5% of patients (201/202).
  • Deferring ICA of the normal artery could potentially reduce procedure time by 4.22 minutes (61% reduction).
  • Radiation exposure could be reduced by 1501 mGy•cm² (29% reduction).

Conclusions:

  • CTCA demonstrates high accuracy in identifying normal contralateral coronary arteries in patients with unilateral CAD.
  • A CTCA-guided ultraselective ICA approach is feasible.
  • This strategy offers significant potential for decreasing procedure time and radiation exposure in cardiac interventions.
Abstract

Keywords:
computed tomographic coronary angiographycoronary angiographycoronary artery diseaseradiation exposure

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